Print io_submit() offsets in decimal

This makes output formatting more consistent with pread()/pwrite(),
which print their offset parameters in decimal.

* desc.c (sys_io_submit): Change offset output format from %llx to %lld.

Signed-off-by: Zev Weiss <zev@bewilderbeest.net>
diff --git a/desc.c b/desc.c
index 69d9e43..cd2c857 100644
--- a/desc.c
+++ b/desc.c
@@ -913,13 +913,13 @@
 					} else
 #endif
 						tprintf(", buf:%p", iocb.u.c.buf);
-					tprintf(", nbytes:%lu, offset:%llx",
+					tprintf(", nbytes:%lu, offset:%lld",
 						iocb.u.c.nbytes,
 						iocb.u.c.offset);
 					print_common_flags(&iocb);
 					break;
 				case SUB_VECTOR:
-					tprintf(", %llx", iocb.u.v.offset);
+					tprintf(", %lld", iocb.u.v.offset);
 					print_common_flags(&iocb);
 					tprints(", ");
 					tprint_iov(tcp, iocb.u.v.nr,